Keep at it, Gentlemen,
My '02 Superduty diesel turned 200,000 miles on January 8, 2011, at 3:40am, in Echo Canyon, UT, hard by the Wyoming border on I-80. It was the return trip from a week's skiing at Park City, UT. She's got 235,000 on the clock today. I'm hoping for (and maintaining faithfully to facilitate) at least 300,000, and would love to see 350-400k miles by the time I retire from work and retire the truck from her strictly recreational duties of today. Maybe, just maybe, I'll keep her long enough for diesel prices to fall back below regular unleaded.
Foy
We met someone who has 300,000+ on their 2001 Superduty. Many more miles are in your future. Our 2008 Superduty has around 100,000.